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The Super DIRTcar Series Big Block Modifieds is a North American big block modified touring series currently promoted by World Racing Group. The series primarily races on dirt ovals in the Northeastern United States and Canada along with select dates in Florida and North Carolina .
The engine was available through mid-1965, when it was replaced by the 396 cu in (6.5 L) 375 hp (280 kW) Mark IV big-block engine. In addition, a 340 hp (254 kW) version of the 409 engine was available from 1963 to 1965, with a single 4-barrel cast iron intake mounting a Rochester 4GC square-bore carburetor, and a hydraulic-lifter camshaft.
The Bolland family purchased the new “Cole” built chassis and Kevin started racing his own car in the 1982 season as a rookie big block dirt modified driver. This season proved to be a banner year, and as a rookie Kevin won 7 features between Mercer Raceway Park, Lernerville Speedway , and Sharon Speedway .
Modern era big-block supermodifieds use a radically offset chassis that is up to 18 inches (460 mm) to the left of center. The engine and drivetrain components are mounted in a specially-fabricated area placed outside the left side frame rails. The engine is thus a stressed member of the chassis.
Black's aluminum engine blocks would dominate the market by the end of the decade. The engines Keith Black produced were based on the Chrysler 426 Hemi, Chevy Big Block, and Oldsmobile Big Block designs, but cut from virgin aluminum castings and built to the customer's specifications. Keith Black died from complications due to brain cancer in 1991.
The Chrysler B and RB engines are a series of big-block V8 gasoline engines introduced in 1958 to replace the Chrysler FirePower (first generation Hemi) engines. The B and RB engines are often referred to as "wedge" engines because they use wedge-shaped combustion chambers; this differentiates them from Chrysler's 426 Hemi big block engines that are typically referred to as "Hemi" or "426 Hemi ...
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